anonymous
  • anonymous
Help! Super easy!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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anonymous
  • anonymous
i like easy questions !
anonymous
  • anonymous
it is pretty easy right? use pythangoras to get the missing side

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anonymous
  • anonymous
\[y^2+84^2=85^2\] solve for \(y\)
anonymous
  • anonymous
you good from there or you need steps?
anonymous
  • anonymous
So what do I do with the number? Do I add them, subtract them or divide?
anonymous
  • anonymous
order of operations
anonymous
  • anonymous
ok lets take the steps
anonymous
  • anonymous
you have one number on one side of the equals side what do you do to get them on the other?
anonymous
  • anonymous
you can do the arithmetic at any time first, last, whatever lets do it first
anonymous
  • anonymous
\[y^2+84^2=85^2\]square each (i used a calculator) to get \[y^2+7056=7225\]
anonymous
  • anonymous
now two steps to find \(y\) first subtract \(7056\) from both sides \[y^2=7225-7056\\ y^2=169\]
anonymous
  • anonymous
then take the square root of \(169\) to find \(y\)\[y=\sqrt{169}=13\]
anonymous
  • anonymous
if you have to do a lot of these, there is another way you might get used to
anonymous
  • anonymous
go right to \[y=\sqrt{85^2-84^2}\] and plug that (carefully) in to a calculator i use this http://www.wolframalpha.com/input/?i=sqrt%2885^2-84^2%29

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